Requirements:- lvl 42 appears to be required to pass NORMAL mode. See the next post for additional requirements for prestige mode. - lvl 7 barracks (infantry) to buy flame thrower soldiers- you will need to access the Military Base, which is unlocked at lvl 42.- energy requirements are estimated, not exact

Requirements additional to normal mode:- you will need a lvl 7 war factory (ground) to be able to buy leopard tanks.- you will need a lvl 7 airfield to be able to buy pavelow helicopters- you will need a lvl 1 robotics factory (ground) to be able to buy anti-aircraft vehicles.- you will need a lvl 1 elite training facility (infantry) to be able to buy Heavy Gunners.- you will need to be able to access the steel plant, which is unlocked at lvl 57.